| Member
functions of the apstring class |
| length(
) |
- returns the number of
characters contained within the string.
- does not include the null character at the end of the
string.
- largest string length is 1024.
example:
apstring name = "Alexis";
cout<< name.length( ); // will display 6 |
| substr(x,
y) |
- returns the part of the string
that starts at position x and is y characters long.
- remember that array subscripts begin at zero.
example:
apstring word = "reaction";
cout<<word.substr(2,3); // will display act |
| find(somestring) |
- returns the position (number)
of the first occurrence of somestring in the string.
example:
apstring name = "Frederick";
cout<<name.find("red"); // will
display 1 |
| find(somechar) |
- returns the position (number)
of the first occurrence of somechar in your string.
example:
apstring word = "roadrunner";
cout<<word.find('e'); // will display 8 |
| c_str( ) |
- returns a C-style (not C++)
string needed when using strings with functions from other
libraries.
example:
apstring number;
cout<< "Please enter one integer ";
cin >> number;
cout<< number << " times three will be
"<< 3 * atoi(number.c_str( ) ); |
|
Operator
member functions of
apstring class |
| Concatenation
puts two strings together so that the second string follows
immediately after the first string. When used with numbers, +
means add, but when used with strings, +
means concatenate.
example:
apstring firstword = "apple";
apstring secondword = "fritter";
cout<< firstword + secondword; //will show applefritter |
It is possible to concatenate one
string onto the end of another string.
Remember: x
+= y means x = x + y.
example:
apstring firstword = "Wally";
apstring secondword = "Dog";
apstring newword = " ";
newword += firstword;
newword += " ";
newword += secondword;
cout<<newword; //
will display Wally Dog |
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